What if create table schema not match CSV file schema?

[holicc]

I want to create an external table from a CSV file using SQL like this:

CREATE EXTERNAL TABLE IF NOT EXISTS region (
        r_regionkey BIGINT,
        r_name VARCHAR,
        r_comment VARCHAR,
        r_rev VARCHAR,
        customer_filed VARCHAR,
) STORED AS CSV LOCATION '../region.tbl' OPTIONS ('format.delimiter' '|', 'format.has_header' 'false');

When I select data from this table, I get an error: ArrowError(CsvError("incorrect number of fields for line 1, expected 5 got 4"), None)

I know the customer_filed field does not exist in the CSV file, but I need this field in the table. How can I achieve this?